Printing-press.



S. SMIiH & U. W. HAMMERQUIST.

PRINTING PRESS.

APPUCATION mm 050.21. @912 1,167,666. Patented Jan. 11, 1915.

5 SHEETS-SHEET 1.

M] tbaessm S. SMHH & U. W. HAMMERQUIST.

PRINTING PRESS.

Mme/mow man DEC.27, 5312.

1157x666. Patented Jun. 11, 1916.

5 SHEETSSHEET 2.

S- SMITH 52 0. W. HAMMERQUEST.

PRIN'HNG PRESS.

APPLICATION FILED DEC. 27. 1912.

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wtimesses Invemifirs 5 u; an. 51 L? h 05 may if Ham 1 1119131111131 Patented Jun. 11, 1916.

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:3. SMITH & 0. W, HAMMERQUIST PRINTING PRESS.

"\PPLiCATION FILED 050.27.1912.

S, SMITH & 0. W. HAMMERQUIST. PRINTING PRESS.

APPLICATION FILED DEC. 27,1912.

1 15?,6fi6. Patented Jan. 11, 1916.

5 SHEETSSHEEI 5.

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nnrTnn STATES PATENT 'onnion.

SWAN SMITH AND. OSCAR W. HAMMERQUIST, OF RAMSEY COUNTY, MINNESOTA, ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, T0 OSTERLIND PRINTING PRESS AND MANUFACTURING COMPANY, OF ST. PAUL, MINNESOTA, A CORPO- RATION OF MINNESOTA.

Specification of Letters Patent.

PRINTING-PRESS.

Patented Jan: 11, 1.916.

To all w/iom it may concern Be t known that \ve,SwAN SMITH and OSCAR V. HAMMER UIsT, citizens of the United States, residing at Ramsey county,

'ing press of this class means for dropping the bed at will, irrespective of the movement or position of the impression cylinder and for automatically retaining said bed in lowered position when the feeding of the press is discontinued.

A further object is to provide in a press of this kind, a power-driven reciprocatory and continuously revoluble impression cylinder. and means for insuring perfect registration between said impression cylinder and the bed of the press. 4

in the drawings Figure 1 is a side elevation of our improved press; Fig. 2 is an end elevation of the same with the feeding table removed and a part of the frame broken away; Fig. 3 is a sectional view taken on. the lined- 3 of Fig. 2; Fig. 4 is a .de-

tail sectional view showing the cylinder and bed. with mechanism for reciprocating the latter vertically; Fig 5 is a detail side eleation illustrating the mechanism for automatically retaining the bed in lowered position, and Fig. (3 is a plan view of the same. ieferring to the drawings, we have used the reference numeral 9 to indicate the press frame, the impression cylinder, 11 the bed which is adapted to receive the ordinarv printing form, 12 the feeding table, and 13 the delivery plat orm.

The impression cylinder 10 is provided with a supporting shaft 14, journaledat its ends in the, carriage blocks 15, which are movable in the guides 16 of the frame 9.

The bed ll is movable horizontally on the 25 backward and forward.

supporting slides 17, which will be hereinafter more fully described. Mechanism for reciprocating the cylinder and bed, and for holding the same a predetermined period at the ends of their strokes. is provided as follows: The cam shaft 18, in the frame 9, carries a double-faced cam if), and is operatively connected through the gear wheels '20 and 21 with the combined power pulley and balance wheel A segment provided at each end with a cam roller ll. is fixed to the rock shaft 25 on the frame 9. Each face of the double cam 19 engages a roller 24 and when rotated rocks the shaft Levers 26, extending upwardly from the shaft arc pivotally attached to a connecting rod 27. These rods pass on either side of the cylinder 10 and are pivotally connected with the carriage blocks 15. An arm 29 on the segment 23 is connected through the link 30, bell-crank 31 and adjustable rod with the bed 11. As the segment 23 is shifted to move the cylinder 10, said arm 29 op crates through said link, crank and rod to more the bed in a direction opposite to that of the cylinder and at substantially the same speed. Th faces of the cam 19 are singularly spaced, each comprising a neutral low surface, an active outwardly extending surface. a neutral high surface, and an inwardly extending surface. The active surfaces cause uniform strokes of the cylinder 10 and bed 11 and the neutral surfaces retain said cylinder and bed for a predetermined interval at the end of their strokes. The cylinder 10 is driven continuously in one direction by the gear wheel 33 on the cylinder supporting shaft l-l through the idle gear 3s which meshes with the driving gear 20 on the cam shaft 18. This idle gear 3% is supported in position and secured in mesh with the gears 33 and 20. by means of the links 35 and 3f), which extend respectivclv to the shafts 1i and 18 and form a folding support between said shafts. 'lhcse links move the idle gear 34 and compensate for the. change in position of the gear 33. as the cylinder 10 moves forward and backward.

The gearing for rotating the cylinder is timed with respect to the horizontal movement of the cylinder and bed to register said cylinder with a printing form contained Within the bed. The wearing of parts, which might otherwise render this registration imperfect, is overcome by a gear wheel 37, forn'ied on the cylinder 10,

and arranged to mesh with the rack 38 on" the bed 11. when said bed is in contact with.

the cylinder. Further adjustment to take up wear in said gear 37 and rack 38 is provided in the rod 32, above described, which is adjustable to change the'relative position of said cylinder and bed, thereby securing perfect -mesh oetween said gear and rack on the printing stroke of the cvlinder.

The bed ll is slidable vertically between the guide plates 39 and horizontally on the supporting slides 17. These slides are reciprocated vertically to normally elevate the bed when thecylinder inovesforward, thus causing said cylinder tobear against the form contained in said bed and to lower the bed to prevent contact between said form and cylinder as the latter moves back. Each end of the slides 17 is supported upon a standard l0 adjustably secured thereto, said standards being mounted at their lower ends upon the movable beams or bases 41. Each base consists of a channel bar 42 having'a bearin g upon a pair ofeccentric blocks 43 slidable within the channel of said bar andgnounted upon the eccentric shafts it.

These shafts are revolu'ble in the frame and are each provided with an arm 4:5, said arms being connected by a link ,46 adapted to synchronize the movements thereof. One of these arms is connected through a second link 4? with the pivotally suspended lever a8, on the frame 9, which is joined by the bar 49 with the cam lever 50. This cam lever is pivotally mounted at one end on the frame and is supplied ii iththe cam roller 51 arranged in engagement with the inside cam 52 on the cam shaft 18. Said cam lever is intermittently oscillated by said cam, this movement being transmitted through said bar 49, lever 4-8, links M3 and 47, and arms 45, to rock the eccentric shafts 4-4, thus raising the bed to and from printing position. The cam 52 is designed and positioned on the shaft 18 to raise the bed on the printing stroke of the cylinder and to lower said bed during the return stroke of said cylinder.

The guide pins on frame 9, extend through perforations in the slides 1'? and retain said slides in their vertical paths.

A. printing form Within the bed 11 is supplied with inkby the form rollers 54: onthe carriage blocks 15. These rollers are furnished with ink by engagement with the inking plate 55 on the bed 11, only when said bed is raised to printing position. Ink is distributed to said inking plate in any ordinary manner not shown.

revoluble shaft 57, in the frame 9, said lever,

being provided with a roller 58 at its end. This lever isnormally. held by the spring 59 in position adjacent to the extended end of the bar 49 above described. The connection between the bar 49 and the cam lever 50 is formed by a pin 60, in said lever, adapt-v ed to engage the notch 61 in said bar. 9peration of the toot-lever raises the bar 49 and disengages the same from the pin 60, thus disconnecting said'bar and lever and permitting the spring 62 between the lever 48 and frame 9, to act through said lever, links 16 and 47, arms-l5, and shafts 4 1*, to instantly lower the bed. means for retaining the bed in lowered po sition, when the feeding of the press is discontinued, is best illustrated in Figs. 5 and.

6. The r'ocloshaft 63, revoluble on the frame 9, is supplied with a roller arm 64, carrying the roller 65, an operating arm 66, and a" shifting lever 67, having a perforation 68 formed in a horizontal extension 69 at its lower end. The trip rod 70 is formed at upper end with the lug 71 and is pivotally attached at its lower end to the lever 753 on the revoluble shaft 57, to which the foo lever 56, above described,- is attached, The bell-crank 73 on'the frame 9 is adapted to engage the operating arm 66 and is normally held by the spring 74 against its stop 75, said crank, when in such positiombeing adapted to secure the operating arm 66 against the action of its spring 76 in inoperative position bv holding the roller 65. above the sun face of the feeding table a suilicientdistance to permit the passage of a sheet oi paper hetween said roller and table. At the end. or the feeding stroke, one of the carriage blocks 15 engages the shock-absorbing bumper 7? on the bell-crank 73, and moves said crank against the action of its spring 7% to the position illustrated in Fig.5. The removal of this bell-crank from engagement with the operating arm 66, permits said arm to turn the shaft 63, The rotation of the shaft carries the roller 65 toward the table 12 where it rests against the sheet of paper to be-fed tothe cylinder 10. Said sheet discontinues the rotation of the shaft 63 and stops the trip rod 70. which is carried by the shifting lever 67 in position adjacent to, but

The automatic It Eli memes out of the path of the trip bar 78 on the carriage blocks 15. In case a sheet of paper is omitted from the table, the roller is carried into the perfo 'ation 79 in said table, thus permitting further rotation of the shaft and movement of the trip rod into the path of said trip bar 78. The cam 80 on the cylinder supporting shaft 1% is designed to raise this trip bar 78 during the rotation of said cylinder from feeding to printing position, while the same rests in its reciprocatory path. The elevation of said trip bar, bv said cam, lifts the trip rod 70, which operates through the lever 72, shaft- 57 and foot-l er 56, to disengage the bar -l-9 from the cam lever 50, thus preventing the elevation of the bed on the printing stroke of the cylinder.

In operation, sheets of paper are successi'vely fed to the impression cylinder 10 which is provided with grips 81 and the ordinary asscciated operating mechanism not shown. This cylinder passes over the bed 12 which advances to meet it and is adapted to deliver the printed sheets to any ordinary delivery mechanism, not shown. 'ihe bed 11 normally elevated on the forward stroke of the impression cylinder 10 to cause the printing form within said bed to bear against said cylinder, and is lowered on the return stroke of the cylinder to prevent such contact. In case the feeding of the press is discontinued, the bed is automatically retained in its lowered position, but may be instantly lowered from its printing position by operating the foot-lever 56.

This improvement in printing presses is particularly advantageous in that the length of the stroke of the cylinder is reduced onehalf by synchronizing therewith a similar stroke of the bed. Contact between the impression cylinder and printing form in the bed. may be automatically prevented or manually and instantly discontinued. The inking operation is automatically discontinued with the dropping of the bed. The stroke is uniform and the reciprocation of the cylinder and bed is intermittent to allow ample time for feeding and delivery. Perfect registry of a reciprrcating bed with a erntinnously revoluble and reciorocating cylinder is secured during the printing stroke of the cylinder and bed, and is maintained by convenient adjustmcnt'if its parts bec me worn.

What we claim as new and desire to protect bv Letters Patent, is:

l. in a printing prc s, the combination of a frame. a be on said frame, an impression cylinder for said bed. mechanism for intermittently engaging said bed and cylinder. means fer continuously rotating said cvlindcr and separate met. as for reciprocat ing said cylinder and bed in straiszht paths in opposite directions and for holding the cylinder at the beginning and end of the printing stroke, whereby during the pause in reciprocation atthe beginning of a stroke, a sheet may be fed -to the cylinder while rotating and carried a substantial distance to printing position and during the pause in reciprocation at the end of a stroke, the

sheet may be withdrawn from printing position and ejected fronr the press by said rotating cylinder.

2. Ina printing press, the combination of a frame, a bed on said frame, an'impression cylinder for said bed, continuously powerdrivcn means for constantly rotating said cylinder and a power-driven cam in operative connection with said cylinder and bed, having active surfaces adapted to intermittently reciprocate the cylinder and bed in opposite directions, one stroke of the cylin-' necticn with said cylinder and bed, said cam having active surfaces adapted to reciprocate the cylinder and bed in opposite directions at speeds proportionate to the peripheral movement of said cylinder, whereby perfect registry between the cylinder and bed is obtained.

4. In a printing press, the combination of a frame, an impression cylinder on the frame, a. bed movable on said frame, means for intermittently reciprocating said bed and cylinder horizontally in opposite directions, power operated mechanism for normally elevating the bed during the forward stroke of the cylinder and for lowering said bed during the return of said cylinder and foot-operated means for rendering said mechanism inoperative.

5. In a printing press, the combination of a frame, an impression cylinder'on the frame. a bed movable on said frame, means for intermittently reciprocating said bed and cylinder horizontally in opposite directions, power operated mechanism for normally elevating the bed during the forward stroke of the cylinder and for lowering said bed during the return of said cylinder, footoperated means and automatically actuated means for rendering said mechanism inoperative.

6. In a printing press, the combination of a frame, a bed on said frame, an impression cylinder for said bed, a cam in operative connection with said cylinder and bed for movements thereof and means for continuously revolving said cylinder, said cam being adapted to move said cylinder and bed coordinately with the rotation of the cylinder to register said cylinder with said bed.

7. In a printing press, the combination of a frame, a bed on said frame, an impression cylinder for said bed, a cam in operative connection with said cylinder and bed for intermittently reciprocating the same horizontally in opposite directions and synchronizing the movements thereof and gearing in operative connection with said cam for continuousiy revolving said cylinder, said cam being adapted to move the cylinder and bed coordinately with the rotation of the former to register said cylinder with said bed and to hold the cylinder at the ends of its strokes, whereby the same may be fed and turned to printing position and revolved from printing to delivery position.

8. In a printing press, the combination of a frame, a bed onsaid frame, an impression cylinder for said bed, power-driven means for continuously revolving said cylinder, means for intermittently reciprocating said cylinder-and bed horizontally in opposite directions and synchronizing the movements thereof, said means beingadapted to move the cylinder and bed coordinately with the rotation of the former to register said cylinder and bed, means for raising the bed to engage the same with said cylinder on its forward stroke and for lowering the bed to prevent such engagement on the return ''of said cylinder.

9. In a printing press, the combination of a frame, a bed and an impression cylinder therefor, movable upon said frame, means a for continuously rotating the cylinder, means for reciprocating said cylinder and bed horizontally in opposite directions and co'cirdinately with the rotation of the former, to register said cylinder and bed, and means for normally reciprocating the bed vertically and for correlating its vertical in'ov'ement with respect to the reciprocation of said cylinder. a

"10. In a printing press, the combination of a frame, a" bed and an impression cylinder thcrefqr, movable upon said frame, means for continuously rotating the cylinder, means for reciprocating said cylinder and bed. horizontally inopposite directions to synchronizetheir movements with the rotation of the cylinder and register said cylinder and bed, mechanism for normally reciprocatmg the bed vertically and for correlating its vertical movement with respect to the reciprocation, of said cylinder and footoperated. means for rendering said mechanism inoperative.

11. In a printingpress, the cembination frame, a power-driven cam inoperative concylinder.

of a frame, a bed and an impression cylinder movable upon said frame, means .for contmuouslyrotatmg the cylinder, means for reciprocating said cylinder and bed hori-. I

zontally in opposite directions, means for in 'termittently raising the bed into cooperation with said cylinder and correlating its vertical movement with respect to the reciprocation of said cylinder, and automatically operated mechanism to' disconnect said last mentioned means and thereby retain-the bed in lowered position, said mechanism being rendered inoperative by the presence of a. I

sheet of 12. In a printing press, the combination of a frame, a continuously revoluble impres-v paper in position to .be-f'edi to said sion cylinder on said frame, a bed on the nection with said cylinder and bed for in termittently reciprocating the same in op-- posite directions, said cam having activesurfaces to move the bed and cylinder and neutral circular surfaces to check and hold said cylinder and bed against reciprocation a brief period at the ends of their strokes.

13. In a printing press, the'combination of a frame, a bed on the frame, an impression cylindr for said" bed,m eans for inter-- mittently reciprocating said cylinder and bed in opposite directions, a power driven shaft'parallel with said cylinder and a train of spur gear wheels, including floating idler wheel, 'operatively connecting said shaft with said cylinder for continuously rotating the latter.

14. In a printing press the combination of a frame, a bed and an impression cylinder therefor movable on said frame, means for reciprocating said cylinder and bed on the frame, a powerdriven shaft, a gear on said shaft, a gear on said cylinder, a pair of pivotally connected links, one of said links being attached to said cylinder and the otherto said power driven shaft, andan idle gear revolubly mounted at the joint between said, links and arranged to mesh with said first mentioned gears." 15. In a. printing-press, the combination of a frame, a bed and an impression cylinder therefor, movable on said frame, means for intermittently reciprocating said cylinder and bed, means for continuously rotating said cylinder, a gear on the cylinder, a rack on said bed, means for raising the bed and meshing said gear with said rack during one stroke of the cylinder and for lowering the bedto prevent the meshing of said rack with said gear during the return stroke of said cylinder. a p

16. In; a printing press, the combination of a frame, carriage blocks slidable on said frame, a cylinder supporting shaft journaled journal pivotally connecting the free ends said cylinder supporting shaft, a second link attached at one end to said power shaft, a

of said links, and an idle gear revoluble on said journal and arranged to mesh with the above mentioned gears.

17. In a printing press, the combination of a frame, a bed on the frame, an impression cylinder for said bed, means for reciprocating said cylinder on said frame, a gear wheel for rotating the cylinder, a power shaft in the frame, a gear wheel on said shaft, a folding support between said cylinder and shaft, and an idle gear journaled on said support and retained thereby in mesh with the above mentioned gears.

18. In a printing press, the combination of a frame, a feeding table therefor, a'bed on the frame, an impression cylinder for said bed, mechanism for raising and lowering the bed, foot operated means for rendering said mechanism inoperative and causing said bed to remain in lowered position, tripping devices operatively connected With said foot-operated means, a spring actuated arm in operative connection with said tripping deyices and adapted to rest upon a sheet of paper when fed from said table to said cylinder, said arm in the absence of a sheet being adapted to tilt and trip said devices so as to lower the bed.

19. In a printing press, the combination of a frame, an impression cylinder on the frame, beams on the frame, means for reciprocating said beams vertically, horizontal supporting slides, standards threaded and adjustable at their'lower ends in said beams and at their upper ends in said slides, a bed on said slides and means for reciprocating the cylinder and bed horizontally in opposite directions.

' 20. In a printing press, the combination of a frame, an impression cylinder slidable on said frame, a power driven cam shaft on the frame, a cam on said shaft, rock shaft on the frame, a segment on said shaft in operative connection with said cam, levers on said rock shaft, rods pivotally connecting said levers with said cylinder, a bed slidable on said frame, a bell crank on said frame, a link pivotally connecting said segment with one arm of said crank, and a rod pivotally connecting the other arm of said crank with said bed.

21. In a printing press, the combination of a frame, an impression cylinder slidable on said frame, a power driven cam shaft on the frame, a cam on said shaft, a rock shaft on the frame, a segment or. said rock shaft in operative connection with said cam, levers on said rock shaft, rods pivotally connecting. said levers with said cylinder, a bed slidable on said frame, a bell crank on said frame, a link pivotally connecting said segmentwith one arm of said crank andan adjustable rod pivotally connecting the other arm of said crank with said bed.

22. In a printing press, the combination of a frame, an impression cylinder revoluble in and slidably mounted on said frame a bed, horizontal slides'for said bed, means for. intermittently reciprocating said cylin der and bed horizontally, mechanism for intermittently reciprocating said slides to normally raise and lower said bed, and correlate its vertical movement withmespect to the movement of the cylinder, and foot-- operated means for rendering said mechagism inoperative and to instantly lower the 23. In a printing press, the combination of a frame, an impression cylinder revoluble in and slidably mounted on said frame, a bed, horizontal slides for said bed, means for intermittently reciprocating saidcylinderand bed horizontally, mechanism for intermittently reciprocating said slides to normally raise and lower said bed, and correlate its vertical movement withrespect to the movement of the cylinder, and automatically operated means for rendering said mechanism inoperative to retain said bed in lowered position.

24. In a printing press, the'combination of a frame, a cylinder revoluble in and slidable on said frame, eccentric shafts on the frame, a bed, horizontal slides for said bed supported on said shafts, means for intermittently reciprocating said cylinder and bed horizontally, and means for simultaneously turning said eccentric shafts to raise and lower the bed. I

25. In a printin press, the combination of a frame, a cylin er revoluble in and slidable on said frame, eccentric shafts'on the frame, a bed, horizontal slides for said bed, said slides being supported on said shafts and adjustable with respect thereto, means for intermittently reciprocating said cylinder and bed horizontally, and means for simultaneously turning said eccentric shafts to raise and lower the bed. 1 I 1 r 26. In a printing press, the combine on of a frame, a cylinder revoluble inand s 'dable on said frame, eccentric shafts on the frame, a bed, horizontal slides for said bed, said slides being supported on said shaf s and adjustable with respect thereto, vertical uides for said slides, means for intermitently reciprocating said cylinder and bed. horizontally and means for simultaneously turning said eccentric shafts to raise and lower the bed.

27. In a printing press, the combination of a frame. an impression cylinder revoluble in and slidably mounted on said frame, ec-

frame and in operative connection withsaid' cam, said lever being operatively connected with one of said shafts for turning the same to raise and lower said bed.

28. in a printing press, the combination of a frame, a cylinder revoluble in and slidable on said frame, eccentric shafts on the lh t l 1'' 'dbd name, a sec, orlzon a s mes I01 sai e bases carried on said shafts, standards mounted on said bases and adjustably at taehed at their upper ends to said slides, means for intermittently reciprocating said cylinder and bed horizontally and means for simultaneously turning said eccentric shafts to raise and lower the bed.

In sprinting press, the combination of a frame, a cylinder revoluble in and slidable on said frame, eccentric shafts on the frame, a bed, horizontal slides for said bed, eccentric blocks on said shafts, bases slidable on and supported by said blocks, standards mounted on said. bases and adjustably at tached at their upper ends to said slides, means for intermittently reciprocating said cylinder and bed horizontally, and means for simultaneously turning said eccentric shafts to raise and'lower the bed.

i 30. In printing press, the combinatmn of a frame, an lmpression cylinder revoluble in and slidably mounted. on said frame, ec-

centric shafts on the frame, a bed, horizontal slldes for said bed, said slides being sup ported on sald shafts, means for reciprocatsaid cylinder and bed horizontally, connecting means between the shafts, bar in operative connection with one of said shafts and formed with a socket therein, a power shaft onsthe frame, a pain on said shaft, a

cam ,everpivoted at one end on the frame and in operative connectihn'with said cam, said lever being provided at its lower end with a ninvzhichis ada ted to normally rest in said socket and forms connection between said; bar and lever whereby upon movement of said cam lever the shafts are turned and the bed is raised and lowered.

31. In a printing press, the combination of a frame, an impression cylinder revoluble in and slidably mounted on said frame, socentric shafts onthe frame, a bed,=horizontal slides for said bed, said slides being supported on said shafts, means for reciprocating said cylinder and bed horizontally, connecting means between the shafts, a barin operative connection with one of said shafts and formed with a socket therein, a power shaft on the frame, a cam on said shaft, :1

cam lever pivoted at one end on the frame and in operative connection with said cam, said lever being provided at its lower end with a pin, which is adapted to normally rest in said socket and form a connection between said bar and lever whereby upon movement of said camlever the shafts are turned and the bed raimd and lowered, resilient means tending to turn said shafts and lower the bed, and a foot lever on the frame adapted to raise said bar to disconnect and hold the same from engagement with said lever.

in a printing press, the combination of a frame, an impression cylinder revoluble in and slidably mounted on said frame, ec-

centric shafts on the frame, a bed, horizontal slides for said bedysaid slides being supported on said shafts, means for intermittently reciprocating said cylinder and bed horizontally, an arm on each eccentric shaft, a link pivotally attached to said arms to synchronize the movement of said shafts,

and means for oscillating said arms to turn said shafts and thereby raise and lower said bed. I

83. In a printingpress, the combination of a frame, an impression cylinder revoluble in and slidably mounted on said frame, eccentric shafts on the frame, a bed, horizontal slides for said bed, said slides being supported on said shafts, means for reciprocatsaid cam lever being provided at its lower end with a pin adapted to normally rest in said socket and form a connection between said bar and lever, whereby upon movement of said cam lever the shafts are turned and the bed raised and lowered, resilient means tending to turn said shafts and lower the bed, a foot lever on the frame adapted to raise said bar to disconnect and hold the same from engagement with said cam lever, and means in operative connection with the foot lever for automatically operating said lever. v

34;. In a printing press, the combination of a frame having a perforated feeding table thereon, a bed, an impression cylinder therefor, movable on said frame, means for reciprocating said cylinder and bed horizontally in opposite directions, mechanism for normally reciprocating said bed vertivwith said mechanism and arm to render sand mechanism inoperative, when said arm names to this specification in the presence of drops into said perforation, and cause the two subscribing; Witnesses.

bed to remain in lowered position and an SWAN SMITH.

operating device carried by said cylinder OSCAR \V. HAMMERQUIST. 5 andhadapted to actuate said connecting Witnesses:

means. F. M. HARDY,

In testimony whereof, We have signed our F. C. .CASWELL. 

